102826
domain: N
Appears in sequences
- Generalized Catalan numbers C(9; n).at n=5A064092
- Sixth diagonal of triangle A064094.at n=9A064302
- Let P(A) be the power set of an n-element set A. Then a(n) = the number of pairs of elements {x,y} of P(A) for which either 0) x and y are disjoint and for which either x is a subset of y or y is a subset of x, or 1) x and y are intersecting but for which x is not a subset of y and y is not a subset of x.at n=9A134018
- Number of partitions of n such that some part is a sum of two or more other parts.at n=46A237668